Question 1010012
RT=D uniform travel rates rule


{{{system(k=9*milesPerHour,h=5*hours,d=1350*miles,r=unknownDoneSpeed,t=unknownDoneTime)}}}

<pre>
             speed        time        distance
DONE          r            t           d
IF           r+k           t-h         d
</pre>

{{{system(rt=d,(r+k)(t-h)=d)}}}
Solve for unknowns t and r.